.header{
    padding: 10px;
    box-sizing: border-box;
    font-size: 20px;
    font-weight: bold;
    text-align: center;
    background-color: white;
    box-shadow:2px 2px 5px #d8d8d8;
    display: flex;
    align-items: center;
    .left{

    }
    .right{

    }
    .middle{
        flex: 1;
        text-align: center;
    }
}